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US2521067A
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Variable-speed reducer
Assignee: Individual
•
Filing: 1945-09-11
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Granted: 1950-09-05
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Expires: 1965-09-11
Abstract
No abstract record available.
Inventors
- 👤 Elden R Kenison
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 20:12
CPC Classifications
F; F16; F16H; F16H29/00; F16H29/02; F16H29/04; F16H29/06; Y; Y10; Y10T; Y10T74/00; Y10T74/15; Y10T74/1503; Y10T74/1508; Y10T74/151; Y10T74/1518; Y10T74/19; Y10T74/19172
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
GB190521297A
Cited
US867136A
Cited
US977449A
Cited
US1572360A
Cited
US1700562A
Cited
GB371667A
Cited
US2186395A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-09-04 | 1954-03-06 | 1954-09-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-09-04 | 1958-03-06 | 1958-09-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-09-04 | 1962-03-06 | 1962-09-05 | $7700.00 | Window Closed / Lapsed |